Accelerating pump for water-heating systems



H. H. ANGUS ACCELERATING PUMP FOR WATER HEATING SYSTEMS.

APPLICATION FILED APR. 7, 1920.

1,2303%. I PatentedSept. 26,1922.

. 1 V N m a 16 A. 2 a F;'-y.1.

77 1s 5 z 7 Z0 14 1O atented Sept. 26, 1922.

UNITED STATES PATENT OFFICE,

HARRY E. ANGUS, OF TORONTO, ONTARIO, CANADA, ASSIGNOR TO THE ATLAS ENGI- NEERING & MACHINE COMPANY LIMITED, OF TORONTO, CANADA.

AGOELERATIN G PUMP FOR WATER-HEATING SYSTEMS.

Application filed April 7,

York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Accelerating Pumps for Water-Heating S stems, described in the following speci cation and illustrated in the accompanying drawings,

that form part of the same. I

The principal objects of the inventlon are to increase the efficiency of boilers used 1n water heating by overcoming the friction of flow and creating a more rapid circulation, and to avoid unnecessary cost of heating installations in providing feed pipes ofv extra large area, and further to devise a form of pump which may be arranged d1- rectly in the circulating system and will not impede the natural flow of water.

The principal features of the invention consist in the novel construction of the pump whereby the velocity of flow of water to the pump is increased by a restricted passage and an accelerating lmpetus is imparted to the water b immediate contact with the impeller, an whereby a smooth and consequently uniform flow of water is so obtained beyond the pump by the arrangement of deflector blades to stop the swirling action as the water leaves the impeller. In the drawings, Figure 1 is a central vertical section through my improved 3 5 pump.

Figure 2 is an end elevational view at the intake end.

Figure 3 is a cross sectional view through the line 11 of Figure 1.

In the ordinary methods of heating by means of hot water, the circulation depends upon the natural flow due to the temperature of the water and such flow is comparatively sluggish owing to the surface friction in the pipes and in order to obtain the best results by natural circulation, the feed and return pipes are usually considerably .over-size. Even with this arrangement, the results are very poor and the water as heated is not circulated to the radiators fast enough.

In order to carry the heated water quick- 1y from the boiler to the radiators, I propose the use of a small rotary pump which accelerates the flow of the water to obtain the 1920. Serial No. 372,078.

desired result. The pump consists of a base 1 formed integral with a right angularly bent conduit 2 the horizontal portion 3 of which is flared outwardly to a recessed flange 4. A plurality of radial webs 5 extend inwardly from the inner peripheral surface of the flaring portion 3 and support centrally a' hub 6 in which is secured a centrally arranged journal bushing 7.

A packing box 8 is formed on the outer Wall of the angular bend of the conduit 2 in alignment with the bushing 7 and a gland 9 is arranged therein.

The frame support of the conduit 2 has formed integral therewith a cross brace 10 in which is arranged a thrust bearing 11. A shaft 12 is journalled in the bushing 7 and gland 9 and its end thrust is taken by the bearing 11. The forward end of the shaft 12 projects beyond the bushing 7 and upon this is mounted a cone-shaped rotor 13, the base and of which is substantially of the same diameter as the forward end of the hub 6 and said rotor is provided with a plurality of vanes 14, which vanes may be and preferably are made separate from the rotor which may be turned accurately and balanced and the blades set into slots machined in the outer surface, thus providing for great efliciency and wear in the rotor.

The forward end of the pump casing is formed of a convergent member 15 having a recessed flange 16 corresponding with and secured to the flange 4 of the member 2. Within the circular recess 17 formed by the flanges 4 and 16 is secured a ring 18 having a plurality of radial vanes 19. These vanes are preferably eight in number and they receive the water delivered from the impeller vanes and stop the swirling motion, directing the water in a straight axial flow. The action of these vanes isgreatly assisted by the radial webs 5 supporting the hub 6.

The front end of the pump casing converges to a throat 20 and again enlarges to the normal diameter at the outer flange 21.

In the use of this device. the pump is introduced in the main feed from the boiler and the natural flow of water is through the flange end 21. If the pump is stationary this flow is not materially impeded because of the increased diameter of the easing and the conical design of the impeller.

When it is desired to utilize the pump in order to accelerate the circulation and therefore to increase thev capacity of the heating apparatus, the shaft 12 is rotated by any suitable form of motor and the impeller blades force the Water through the pipes. As the water leaves the impellers it impinges upon the vanes 19 of the ring 18 which stop the swirling action in which they are assisted by the webs 5 and the water then flows on through the system Without swirling.

A very small device such as described inserted in an ordinary heating system very greatly increases its efficiency. There is very little, if any, resistance to the natural flow of the water to the pump even when stationary, consequently the operation of the impeller with its spiral blades accelerates the flow to a very considerable extent.

What I claim as my invention is 1. An accelerating pump for water heating systems, comprising, a casing convergent at both ends, a rotor of conical shape centrally disposed in the intake end of the casing and having radial impellervanes, a plurality of stationary radial vanes arranged aforesaid casing, a ring arranged in the recess formed between said flanges, said ring having a plurality of inwardly extending radial vanes arranged with their surfaces parallel with the axis of the casing, journal bearings rigid with the secondary casing arranged in alignment, a shaft journalled in said bearings, and a conical shaped rotor supported upon the end of said shaft within the intake portion of the casing and forward of said radial vanes.

HARRY H. ANGUS. 

